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Ultrafast optoelectronics devices, critical for future telecommunication and data ultra high speed communications and data communications, have been limited in speed due to nature of the materials forming the devices. Only very few materials can be used today as substrates for high speed optoelectronics limiting the applicability of these devices and preventing their integration with other emerging...
Device modeling has been essential in discovery of innovative concepts, assessing their value proposition and in guiding the process engineering of devices to continue Moore's Law performance scaling for Metal Oxide Semiconductor Field Effect transistors (MOSFET) [1]. TCAD has traditionally relied on continuum model of transport by solving drift-diffusion (DD) equations and including bandstructures...
Quantum computing holds the promise of a novel form of information processing in which data resides in quantum states. By exploiting superpositions and entanglement among these states, quantum logic operations are expected to far surpass conventional digital logic in certain classes of problems. To realize this prospect, we employ superconducting circuits at millikelvin temperatures. The nonlinearity...
III-V MOSFETs are candidates for extension of the scaling roadmap beyond 10 nm. In the vertical direction, the requirements on gate-length scaling is less stringent and vertical III-V nanowire FETs are thus attractive for high density and low-power applications. While growth in the vertical direction allows flexibility in heterostructure combination and eases the path for integration on Si substrates,...
Magnetic devices are a leading contender for the implementation of memory and logic technologies that are non-volatile, that can scale to high density and high speed, and that do not wear out. However, widespread application of magnetic memory and logic devices will require the development of efficient mechanisms for reorienting their magnetization using the least possible current and power. Until...
It has been half a century since the photons have been portended to supplant electrons in information transmission, storage, and processing. While spectacular successes have been achieved in optical communications and these advances are slowly working their way into the chip-scale optical interconnects, optical memories have not displaced magnetic storage and are now losing ground to the all-electronic...
Quantum Cascade (QC) lasers are a rapidly evolving mid-infrared and THz, semiconductor laser technology based on intersubband transitions in multiple coupled quantum wells. The lasers' strengths are their wavelength tailorability, high performance and fascinating design potential.
The emerging field of “topological spintronics” is rooted in the recent realization that narrow band gap semiconductors such as the Bi- and Sb-chalcogenides support two dimensional (2D) helical Dirac fermion surface states characterized by a spin-texture in momentum space [1,2]. Spin- and angle-resolved photoemission spectroscopy [3] has revealed the linear dispersion and the “spin-momentum locking”...
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